Section 18 Universal Serial Bus Interface (USB)
Rev. 3.00 Jan 25, 2006 page 560 of 872
REJ09B0286-0300
EPDR0I
Bit
Bit Name
Initial Value R/W
Description
7 to 0 D7 to D0
All 0
W
Endpoint 0 is used for input or output transfer and
EPDR0I is specified as a write-only register.
EPDR1
Bit
Bit Name
Initial Value R/W
Description
7 to 0 D7 to D0
All 0
W
Endpoint 1 is used for input transfer and EPDR1 is
specified as a write-only register.
EPDR2
Bit
Bit Name
Initial Value R/W
Description
7 to 0 D7 to D0
All 0
R or W EPDR2 is specified as a write-only or read-only
register depending on the transfer direction specified
by EPDIR0.
EPDR3
Bit
Bit Name
Initial Value R/W
Description
7 to 0 D7 to D0
All 0
W
Endpoint 3 is used for input transfer and EPDR3 is
specified as a write-only register.
18.3.4
Endpoint Valid Size Registers 0S, 0O, 0I, 1, 2, and 3 (FVSR0S, FVSR0O, FVSR0I,
FVSR1, FVSR 2, and FVSR3)
FVSRs indicate the number of valid data items stored in FIFOs in each endpoint of the USB
function core. Since endpoints 4 and 5 do not use FIFOs in the USB interface, they perform data
transfer by using the RFU which has the function corresponding to FVSRs.
In host input transfer, FVSR indicates the number of bytes that the slave CPU can write to the
FIFO (FIFO size — number of bytes that are written to the FIFO by the slave CPU but which are
not read (transmitted) by the USB function core). In host output transfer, FVSRs indicate the
number of bytes that are written to the FIFO by the USB function core but which are not read by
the slave CPU.
Содержание H8S/2158
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Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
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Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
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Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...